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US 2012/0328057 A1Published application
Method and apparatus for implementing signal quality metrics and antenna diversity switching control
AssigneeiBiquity Digital Corporation
InventorsBrian W. Kroeger, Paul J. Peyla
Life of this patent
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Abstract
A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.
Claims39
A method comprising:
- receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples;
- computing correlation points between endpoint samples in cyclic-prefix regions of adjacent symbols;
- and
- using the correlation points to produce a digital signal quality metric.
1 more element
An apparatus comprising:
- a radio receiver including an input for receiving a radio signal having a digital portion modulated by a series of symbols, each including a plurality of samples, and a processor for computing correlation points between samples in cyclic-prefix regions of the symbols to produce a digital signal quality metric.
A method comprising:
- receiving a radio signal including an analog modulated portion;
- digitally sampling an analog modulated portion of the radio signal to produce a plurality of samples;
- using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute an analog signal quality metric.
An apparatus comprising:
- a radio receiver including an input for receiving a radio signal having an analog modulated portion;
- and a processor for digitally sampling the analog modulated portion to produce a plurality of samples, and using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute an analog signal quality metric.
A method comprising:
- (a) receiving a radio signal on a plurality of antenna elements;
- (b) computing a signal quality metric for the signal received on each of the antenna elements;
- (c) determining a difference value between the signal quality metric for the currently selected antenna element and the signal quality metric for each of the other antenna elements;
- (d) finding the minimum difference value;
- (e) determining (1) if a dwell value is greater than a multiple of the minimum difference value and (2) if the signal quality metric for first antenna element is less than a threshold value;
- and
- (f) if either or both of (1) or (2) in step (e) is true, then switching from the currently selected element to one of the other antenna elements for supplying the radio signal to a receiver and repeating steps (b) through (e).
4 more elements
An apparatus comprising:
- a plurality of antenna elements for receiving a radio signal;
- a switch for connecting one or more of the antenna elements to an input of a receiver;
- and
- a processor for (a) computing a signal quality metric for the signal received on each of the antenna elements, (b) determining a difference value between the signal quality metric for the currently selected antenna element and the signal quality metric for each of the other antenna elements, (c) finding the minimum difference value, (d) determining (1) if a dwell value is greater than a multiple of the minimum difference value and (2) if the signal quality metric for first antenna element is less than a threshold value, and (e) if either or both of (1) or (2) in step (e) is true, then controlling the switch to switch from the currently selected element to one of the other antenna elements for supplying the radio signal to the receiver and repeating steps (a) through (d).
1 more element
A method comprising:
- receiving a radio signal on a plurality of antenna elements;
- computing a signal quality metric for the signal received on each of the antenna elements;
- using the signal quality metric for an antenna element currently supplying the radio signal to a receiver to determine if diversity switching is desired;
- and
- producing a proxy control signal that causes a diversity switch control to implement a desired switching of the antenna elements.
2 more elements
A method comprising:
- receiving a radio signal on a plurality of antenna elements, wherein the radio signal includes an analog modulated portion and a digitally modulated portion;
- computing an analog signal quality metric for the analog modulated portion of the received radio signal;
- computing a digital signal quality metric for the digital modulated portion of the received radio signal;
- and
- using either the analog signal quality metric or the digital signal quality metric to select one or more of the antenna elements to be connected to a receiver input, wherein a reaction time for selecting the antenna elements based on the analog signal quality metric is shorter than a reaction time for selecting the antenna elements based on the digital signal quality metric.
2 more elements
An apparatus comprising:
- a plurality of antenna elements for receiving a radio signal, wherein the radio signal includes an analog modulated portion and a digitally modulated portion;
- a switch for connecting one or more of the antenna elements to an input of a receiver;
- and
- a processor for computing an analog signal quality metric for the analog modulated portion of the received radio signal, computing a digital signal quality metric for the digital modulated portion of the received radio signal, and using either the analog signal quality metric or the digital signal quality metric to produce a switch control signal for selecting one or more of the antenna elements to be connected to a receiver input;
- wherein a reaction time for selecting the antenna elements based on the analog signal quality metric is shorter than a reaction time for selecting the antenna elements based on the digital signal quality metric.
2 more elements
Dependencies are inferred from the claim text.